| http://www.w3.org/ns/prov#value | - With respect to materials, the delivery portion 402 may be formed from relatively soft materials such as silicone rubber, TEFLON PTFE, polyethylene, polyurethane and Vectra??? liquid crystal polymer, while the manifold portion 404 may be formed from a hard plastic such as PEEK or TEFLON PTFE or a metal such as titanium.
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